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Håkon Dahle's picture

Håkon Dahle

Associate Professor, Group Leader at Computatonal Biological Unit; WP leader at K.G. Jebsen Centre for Deep Sea Research
  • E-mailHakon.Dahle@uib.no
  • Phone+47 55 58 38 61+47 911 12 246
  • Visitor Address
    Thormøhlens gate 53 A/B
  • Postal Address
    Postboks 7803
    5020 Bergen

I am a microbial ecologist interested in how natural and human drivers affect populations, communities and ecosystems at different spatial and temporal scales. 

I am a Group Leader at the Computational Biological Unit (CBU), and lead the work-package 'Energy and Life' at the K.G. Jebsen Centre for Deep Sea Research.

My research is centered around the following research questions:

How is microbial community structure and diversiy shaped by chemical power supply?

What is the connection between the geological setting, geochemistry, and microbial ecology of hydrothermal systems?

How does marine mine tailings in Norwegian fjords affect microbial life?

What is the optimal microbial community structure in land-based fish farms (RAS), and how to maintain it?

To address these questions we make use of population dynamic models, field observations, and statistical analyses. A central part of our work is bioinformatic analyses of next generation sequencing data.

Please make contact if you are interested in a PhD, MSc, or a Bachelor project connected to any of these themes.

 

 

Public outreach

Polhavets hemmeligheter (kronikk i Nordlys)

 

Academic article
  • Show author(s) (2021). Microbial colonization and community stability in a marine post-smolt RAS inoculated with a commercial starter culture. Aquaculture Reports. 1-13.
  • Show author(s) (2021). Exploring codon adjustment strategies towards Escherichia coli-based production of viral proteins encoded by HTH1, a novel prophage of the marine bacterium Hypnocyclicus thermotrophus. Viruses.
  • Show author(s) (2021). Adaptive evolution of viruses infecting marine microalgae (haptophytes), from acute infections to stable coexistence. Biological Reviews. 1-16.
  • Show author(s) (2021). A persistent giant algal virus, with a unique morphology, encodes an unprecedented number of genes involved in energy metabolism. Journal of Virology. 1-58.
  • Show author(s) (2020). Tailoring hydrothermal vent biodiversity towards improved biodiscovery using a novel in-situ enrichment strategy. Frontiers in Microbiology.
  • Show author(s) (2020). Indigenous ammonia-oxidizing archaea in oxic subseafloor oceanic crust. mSystems.
  • Show author(s) (2020). A case study of biofilter activation and microbial nitrification in a marine recirculation aquaculture system for rearing Atlantic salmon (Salmo salar L.). Aquaculture Research. 1-11.
  • Show author(s) (2019). Profundibacter amoris gen. nov., sp. nov., a new member of the Roseobacter clade isolated from Loki's Castle Vent Field on the Arctic Mid-Ocean Ridge. International Journal of Systematic and Evolutionary Microbiology. 975-981.
  • Show author(s) (2019). Microbial Communities in a Flow-Through Fish Farm for Lumpfish (Cyclopterus lumpus L.) During Healthy Rearing Conditions. Frontiers in Microbiology.
  • Show author(s) (2019). Comparison of active biofilm carriers and commercially available inoculum for activation of biofilters in marine recirculating aquaculture systems (RAS). Aquaculture.
  • Show author(s) (2018). Water masses and depth structure prokaryotic and T4-like viral communities around hydrothermal systems of the Nordic Seas. Frontiers in Microbiology. 1-17.
  • Show author(s) (2018). Energy landscapes in hydrothermal chimneys shape distribution of primary producers. Frontiers in Microbiology.
  • Show author(s) (2018). Distribution patterns of iron-oxidizing Zeta- and Beta-Proteobacteria from different environmental settings of the Jan Mayen vent fields. Frontiers in Microbiology.
  • Show author(s) (2017). Environmental controls on biomineralization and Fe-mound formation in a low-temperature hydrothermal system at the Jan Mayen Vent Fields. Geochimica et Cosmochimica Acta. 101-123.
  • Show author(s) (2016). The Microbiome and Occurrence of Methanotrophy in Carnivorous Sponges. Frontiers in Microbiology. 1-14.
  • Show author(s) (2016). Novel barite chimneys at the Loki´s Castle vent field shed light on key factors shaping microbial communities and functions in hydrothermal systems. Frontiers in Microbiology.
  • Show author(s) (2016). Lutibacter profundi sp. nov., isolated from a deep-sea hydrothermal system on the Arctic Mid-Ocean Ridge and emended description of the genus Lutibacter. International Journal of Systematic and Evolutionary Microbiology. 2671-2677.
  • Show author(s) (2016). Linkages between mineralogy, fluid chemistry, and microbial communities within hydrothermal chimneys from the Endeavour Segment, Juan de Fuca Ridge. Geochemistry Geophysics Geosystems. 300-323.
  • Show author(s) (2015). Physiological and genomic characterization of Arcobacter anaerophilus IR-1 reveals new metabolic features in Epsilonproteobacteria. Frontiers in Microbiology.
  • Show author(s) (2015). Functional interactions among filamentous Epsilonproteobacteria and Bacteroidetes in a deep-sea hydrothermal vent biofilm. Environmental Microbiology. 4063-4077.
  • Show author(s) (2015). Evidence for extensive gene flow and Thermotoga subpopulations in subsurface and marine environments. The ISME Journal. 1532-1542.
  • Show author(s) (2015). Energy landscapes shape microbial communities in hydrothermal systems on the Arctic Mid-Ocean Ridge. The ISME Journal. 1593-1606.
  • Show author(s) (2013). The versatile in situ gene expression of an Epsilonproteobacteria-dominated biofilm from a hydrothermal chimney. Environmental Microbiology Reports. 282-290.
  • Show author(s) (2012). Low temperature alteration of serpentinized ultramafic rock and implications for microbial life. Chemical Geology. 75-87.
  • Show author(s) (2012). Fine-scale community structure analysis of ANME in Nyegga sediments with high and low methane flux. Frontiers in Microbiology. 1-13.
  • Show author(s) (2011). New insight into stratification of anaerobic methanotrophs in cold seep sediments. FEMS Microbiology Ecology. 233-243.
  • Show author(s) (2011). Evolution of temperature optimum in Thermotogaceae and the prediction of trait values of uncultured organisms. Extremophiles. 509-516.
  • Show author(s) (2009). The Genome of Thermosipho africanus TCF52B: Lateral Genetic Connections to the Firmicutes and Archaea. Journal of Bacteriology. 1974-1978.
  • Show author(s) (2009). Kosmotoga olearia gen. nov., sp nov., a thermophilic, anaerobic heterotroph isolated from an oil production fluid. International Journal of Systematic and Evolutionary Microbiology. 2991 -3000.
  • Show author(s) (2008). Rock support design for special lighting caverns in high in-situ stress rock mass. Chinese Journal of Rock Mechanics and Engineering.
  • Show author(s) (2008). Microbial community structure analysis of produced water from a high-temperature North Sea oil-field. Antonie van Leeuwenhoek. International Journal of General and Molecular Microbiology. 37-49.
  • Show author(s) (2006). Thermovirga lienii gen. nov., sp. nov., a novel moderately thermophilic, anaerobic, amino-acid-degrading bacterium isolated from a North Sea oil well. International Journal of Systematic and Evolutionary Microbiology. 1539-1545.
Lecture
  • Show author(s) (2014). Towards a framework for analyses of how energy landscapes shape microbial communities in deep-sea hydrothermal systems.
  • Show author(s) (2014). Metagenomic study of a filamentous microbial mat from the Loki´s Castle Vent Field.
Academic lecture
  • Show author(s) (2019). Friends or foes, strategies for stable co-existance in algel viruses infecting haptophytes.
  • Show author(s) (2019). Biogeochemical processes in submarine mine tailings and the impact on benthic fauna.
  • Show author(s) (2018). Monitoring the main changes in the bacterial community in a RAS biofilter during the first year of operation.
  • Show author(s) (2018). Mikrobiell overvåkning av rognkjeksanlegg ved omfattende prøvetaking og detaljert analyseverktøy.
  • Show author(s) (2018). Mikrobiell overvåkning av rognkjeksanlegg -prøvetaking og analyseverktøy.
  • Show author(s) (2016). Weathering of sulphides at the Arctic Mid-Ocean Ridge.
  • Show author(s) (2016). Mobilization of heavy metals in submarine mine tailings.
  • Show author(s) (2016). Local environmental controls on microbial Fe(II)-oxidation in seafloor hydrothermal deposits.
  • Show author(s) (2014). Use of metatranscriptomics, amplicon pyrosequencing and thermodynamics to assess how microbial communities are shaped by energy availability.
  • Show author(s) (2014). Microbial communities associated with low-temperature venting barite chimneys in the Loki´s Castle black smoker field.
  • Show author(s) (2014). Microbial communities associated with low-temparture venting barite chimneys in the Loki´s Castle black smoker field.
  • Show author(s) (2014). Energy landscapes shape microbial communities and the distribution of biosignatures in hydrothermal systems on the Arctic Mid-Ocean Ridge.
  • Show author(s) (2013). Thermodynamic constraints on the microbial ecology and biogeochemical cycling in deep-sea hydrothermal systems.
  • Show author(s) (2013). Formation of barite chimneys at low-temperature hydrothermal venting: evidence for complex geobio-interactions.
  • Show author(s) (2012). Metagenomics of arctic hydrothermal vent biofilms.
  • Show author(s) (2011). Microbial processes and biomineralisation associated with low-temperature venting and formation of barite chimneys at Loki's Castle hydrothermal field.
  • Show author(s) (2010). A variety of microbial mats cover the chimney walls of the Loki's Castle hydrothermal field.
  • Show author(s) (2003). Treasures in the deep biosphere of North Sea oil-wells.
  • Show author(s) (2000). Thermosipho strain TBA5, a new thermophilic anaerobic bacterium, isolated from a North Sea oil field.
  • Show author(s) (2000). Thermosipho strain TBA5, a new thermophilic anaerobic bacterium, isolated from a North Sea oil field.
Thesis at a second degree level
  • Show author(s) (2001). Karakterisering av en bakteriestamme fra ordenen Thermotogales, isolert fra et oljereservoar i Nordsjøen.
Doctoral dissertation
  • Show author(s) (2018). Iron-Oxidizing Microorganisms at the Jan Mayen Hydrothermal Vent Fields.
  • Show author(s) (2007). Microbiological analyses of produced water from a high-temperature oil formation in the North-Sea.
Poster
  • Show author(s) (2021). Iron Oxidizers and Sheath-forming Zetaproteobacteria in Biofilms of the Newly Discovered Fåvne Hydrothermal Vent Field.
  • Show author(s) (2019). Microbial activation of biofilters in marine RAS -based on lab experiments and field observations.
  • Show author(s) (2019). Identification of key-players in anaerobic alkane oxidation in the diffuse venting Barite Field at the Loki´s castle.
  • Show author(s) (2019). Effect of UV water treatment on microbial community structure Studied in two different land based aquaculture systems.
  • Show author(s) (2015). Isolation, characterization and genome analysis of a nitrate reducing Arcobacter sp. isolated from injection water.
  • Show author(s) (2014). Microbial community changes within a chimney wall at the basalt-hosted Jan Mayen vent field (JMVF):Modeled predictions vs. Pyrosequencing data.
  • Show author(s) (2014). Exploring the biotechnological potential of microbial communities in the Jan Mayen Vent Fields by use of in situ incubation chambers.
  • Show author(s) (2014). Comparison of microbial communities within iron-containing mats at different geochemical settings in the Jan Mayen vent field.
  • Show author(s) (2013). Stability of heavy metals in submarine tailings: A geochemical and microbiological study.
  • Show author(s) (2013). Exploring the biotechnological potential of microbial communities in the Jan Mayen Vent Fields by use of in situ incubation chambers.
  • Show author(s) (2012). Microbial mediated formation of low-temperature hydrothermal barite chimneys.
  • Show author(s) (2012). Metatranscriptomic and phylogenetic analysis of bacterial mats growing on chimney surfaces at the Loki´s Castle hydrothermal field.
  • Show author(s) (2012). Low temperature alteration of ultramafic rock sustaining associated microbial communities.
  • Show author(s) (2012). Combined spectroscopic, microscopic and DNA analyses of hydrothermal siliceous Fe despots.
  • Show author(s) (2010). Microbial community structure of biomats and chimney walls of the Loki’s Castle hydrothermal field at 73°N.
  • Show author(s) (2010). Detection of methanotrophic archaea in a barite chimney at Loki’s Castle, the Arctic Mid-Ocean Ridge.
  • Show author(s) (2008). Kosmotoga olearia gen. nov., sp. nov., a thermophilic, anaerobic heterotroph isolated from Troll B oil production fluid in the North Sea.
  • Show author(s) (2007). Microbial community structure analysis of produced water from a high-temperature oil-field in the North-Sea.
  • Show author(s) (2007). Microbial community structure analysis of produced water from a high-temperature North-Sea oil-field.
  • Show author(s) (2005). Molecular and Culture-Based Analysis of Bacteria and Archaea from a North Sea Oil-Reservoir.
  • Show author(s) (2005). Molecular and Culture-Based Analyses of Bacteria and Archaea from a North Sea Oil-Reservoir.
  • Show author(s) (2004). Enrichment and isolation of thermophilic organisms capable of fermenting organic polymers.
  • Show author(s) (2003). Bioprospecting of thermophilic hydrogen-producing microorganisms.
  • Show author(s) (2003). Analysis of microbial communities associated with deep North Sea oil-wells using culture-dependent and culture-independent strategies.
  • Show author(s) (2003). Analysis of microbial communities associated with deep North Sea oil-wells using culture-dependent and culture-independent strategies.
  • Show author(s) (2002). Novel bacterial lineages dominating in oil-well formation water.
  • Show author(s) (2000). Characterisation of a new bacterial strain from the order Thermotogales, isolated from an oil-producing well in the North Sea.
  • Show author(s) (2000). Characterisation of a new bacterial strain from the order Thermotogales, isolated from an oil-producing well in the North Sea.
  • Show author(s) (1999). Isolation and characterization of two <I>Petrotoga</I>-like isolates from a North Sea oil-producing well.
Academic literature review
  • Show author(s) (2021). Going to extremes - A metagenomic journey into the dark matter of life. FEMS Microbiology Letters. 1-16.
  • Show author(s) (2013). Microbial life associated with low-temperature alteration of ultramafic rocks in the Leka ophiolite complex. Geobiology. 318-339.
Article in business/trade/industry journal
  • Show author(s) (2018). Biofilterprosesser i endring over tid. Nf xpert : en spesialutgave av Norsk fiskeoppdrett. 46-48.

More information in national current research information system (CRIStin)

Current projects:

VIRVAR - Uncovering key players for regulation of phytoplankton function and structure: lessons to be learned from algal virus-haptophyte coexistence (NFR)

MONITOR - Adapting monitoring tools for bacterial load detection in closed marine fish farms: for improved fish health and reduced mortalities (NFR)

Research groups